JP2710319B2 - Tug of war training machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a tug-of-war training machine, and more particularly to a tug-of-war training machine capable of practicing tug-of-war practice on the imaginary team. (Prior Art) In recent years, tug of war as a team sport has been revived, and various local and national tournaments have been held. In this case, in order to compete, the two teams must of course gather at the same spot, for example, each team must gather at two separate spots, such as Tokyo and Osaka, and conduct the competition Is impossible. Even if the opponent team is not present, as a device that can virtually practice tug-of-war with only the own team, this applicant outputs a pattern signal that fluctuates the traction force and traction speed at a set cycle from the pattern generator. Based on this pattern signal, the motor control unit controls the rotational force and rotational speed of the drive motor at a set cycle, thereby applying a tug-of-war tutoring machine that changes the pulling force and the pulling speed of the rope for tug-of-war via the rotating body. (Japanese Patent Application No. 61-271195). (Problems to be Solved by the Invention) The above invention directly controls the rotational force and the rotational speed of the motor, but has a drawback that the device becomes complicated,
It is an object of the present application to provide a tug-of-war training machine having a simpler structure using a torque motor in connection with this improvement. [Structure of the Invention] (Means for Solving the Problems) The tug-of-war tutor of the present invention is connected to a rotating body for towing a rope for tug-of-war and a rotating shaft of the rotating body via a speed reducer. A torque motor and a control device for controlling an applied voltage of the torque motor are provided. The control of the torque motor can be performed by a preset pattern signal. In this case, a pattern generator is connected to the control device. (Operation) In the present invention, instead of directly controlling the rotating force and the rotating speed of the electric motor, by controlling the applied voltage of the torque motor coupled to the rotating shaft of the rotating body via the speed reducer, both positive and negative are controlled. The characteristics, that is, the direction of the applied voltage and the rotation direction of the rotating body can be rotated in both forward and reverse directions, whereby a tug of war can be practiced by applying a pulling force to the tug rope connected to the rotating body. . Example An example of the present invention will be described below. FIG. 1 shows a tug-of-war training machine 1 according to the present invention, wherein 2 is a torque motor, 3 is a speed reducer, and 4 is a capstan drum. A speed reducer 3 is connected to the output side of the torque motor 2, and a capstan drum 4 is connected via the speed reducer. The drum is rotatably supported by support members 5, 5 '. . As shown in FIG. 2, one end of a wire rope 6 is fixed to the drum, and the end of a tug rope 7 is connected to the other end of the rope by turning a connector 8. Practice of tug-of-war is performed by pulling the tug-of-war rope in the direction of the arrow. FIG. 3 shows an example of a torque characteristic curve of the torque motor 2. Positive characteristics and negative characteristics, that is, the motor can be used by rotating the direction of the applied voltage and the rotating direction in the opposite direction, thereby reducing the load torque. Accordingly, it can be used over a wide range up to near the periodic speed. Torque motor 2
Is controlled by the output signal of the controller 9, and the controller 9 simultaneously controls the electromagnetic brake 10 coupled to the rotating shaft of the torque motor 2 as a safety measure at the time of power failure. This electromagnetic brake is of a non-excitation type. The torque of the capstan drum, that is, the torque, is detected by the torque meter 11, the torque is displayed by the detector 12, and a detection signal is output to the controller 9. Instead of a torque meter, a load cell or the like may be used to directly detect a tensile force. The output signal to the torque motor 2 is controlled by arbitrarily changing the voltage set value K to the controller 9 or controlling the torque according to the output signal of the torque meter 11. Further, it can be controlled by the pattern generator 13 using a pattern signal corresponding to a tug-of-war pattern. Each of the above components is fixed on a gantry 14, and this gantry is fixed to the floor surface with anchor bolts or the like. Next, the operation of the tug-of-war training machine 1 will be described. First, the voltage applied to the torque motor 2 is set by the controller 9, and the torque motor 2 is moved in the forward direction (the direction in which the rope is pulled in).
To rotate. In this state, the tug-of-war rope 7 is pulled in the direction of the arrow. If the set motor torque is equal to the tug-of-war force, the motor is locked, and if the tug-of-war force is further increased, the motor reverses while generating torque. Further, when the tug force is weakened from the locked state, the motor rotates forward to pull in the tug.
When the torque motor 2 is controlled by the detection signal of the torque motor 11, the detected value is compared with a set value, and the set value is corrected according to the difference signal. In the case of controlling by a pattern signal, for example, a pattern in which the applied voltage of the torque motor is changed as shown in FIG. 4 (b) in response to a change in the pulling force of the tug-of-war team as shown in FIG. 4 (a). The signal is output from the pattern generator 13 to the controller 9. [Effects of the Invention] As described above, according to the tug-of-war training machine of the present invention,
A single team can practice tug-of-war by connecting a rotating body for towing the tug-of-war rope to a torque motor via a speed reducer and adjusting the torque of this torque motor with a control device. The structure is also simple. When the applied voltage of the torque motor is controlled by the output signal of the pattern generator, the practice can be performed in a state closer to the actual tug-of-war state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing an embodiment of a tug-of-war tutor according to the present invention, FIG. 2 is a view showing a connected state of a tug-of-war rope, FIG.
FIG. 4 is a graph showing a torque characteristic curve, FIG. 4 (a) is a graph showing an example of a change in tensile force during tug-of-war, and FIG. 4 (b).
4 is a graph showing a pattern signal of a voltage applied to the torque motor according to a change in the pulling force in FIG. 4 (a). DESCRIPTION OF SYMBOLS 1 ... Tug-of-war training machine 2 ... Torque meter 3 ... Reducer 4 ... Capstan drum 7 ... Tug-of-war rope 9 ... Controller 11 ... Torque motor 12 ... Display 13 ... Pattern generator

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Takeshi Kurashima               2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture               No. 1 Showa Electric Wire & Cable Co., Ltd. (72) Inventor Seiichiro Sano               2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture               No. 1 Showa Electric Wire & Cable Co., Ltd.

Claims (1)

(57) [Claims] A rotating body for towing the tug of war rope, a torque motor coupled to a rotating shaft of the rotating body via a speed reducer, and a control device for controlling an applied voltage of the torque motor, Tug of war training machine. 2. A rotating body for towing a tug of war rope, a torque motor coupled to a rotating shaft of the rotating body via a speed reducer, a control device for controlling an applied voltage of the torque motor, and a control device connected to the control device; A tug-of-war training machine, comprising: a pattern generator that outputs a preset pattern signal for changing an applied voltage of the torque motor.